如何检查iOS是否为最新版本

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1. - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions  
2. {  
3.     self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];  
4.       
5.       
6.     NSString *key = (NSString *)kCFBundleVersionKey;  
7.       
8.     // 1.从Info.plist中取出版本号  
9.     NSString *version = [NSBundle mainBundle].infoDictionary[key];  
10.       
11.     // 2.从沙盒中取出上次存储的版本号  
12.     NSString *saveVersion = [[NSUserDefaults standardUserDefaults] objectForKey:key];  
13.       
14.     if ([version isEqualToString:saveVersion]) { // 不是第一次使用这个版本  
15.         // 显示状态栏  
16.         application.statusBarHidden = NO;  
17.           
18.         self.window.rootViewController = [[MainController alloc] init];  
19.     } else { // 版本号不一样：第一次使用新版本  
20.         // 将新版本号写入沙盒  
21.         [[NSUserDefaults standardUserDefaults] setObject:version forKey:key];  
22.         [[NSUserDefaults standardUserDefaults] synchronize];  
23.           
24.         // 显示版本新特性界面  
25.         self.window.rootViewController = [[NewfeatureController alloc] init];  
26.     }  
27.     NSLog(@”key=%@,version=%@,infoDictionary=%@,saveVersion=%@,standardUserDefaults=%@”,key,version,[NSBundle mainBundle].infoDictionary,saveVersion,[NSUserDefaults standardUserDefaults]);  
28.     [self.window makeKeyAndVisible];  
29.     return YES;  
30. }  

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];


    NSString *key = (NSString *)kCFBundleVersionKey;

    // 1.从Info.plist中取出版本号
    NSString *version = [NSBundle mainBundle].infoDictionary[key];

    // 2.从沙盒中取出上次存储的版本号
    NSString *saveVersion = [[NSUserDefaults standardUserDefaults] objectForKey:key];

    if ([version isEqualToString:saveVersion]) { // 不是第一次使用这个版本
        // 显示状态栏
        application.statusBarHidden = NO;

        self.window.rootViewController = [[MainController alloc] init];
    } else { // 版本号不一样：第一次使用新版本
        // 将新版本号写入沙盒
        [[NSUserDefaults standardUserDefaults] setObject:version forKey:key];
        [[NSUserDefaults standardUserDefaults] synchronize];

        // 显示版本新特性界面
        self.window.rootViewController = [[NewfeatureController alloc] init];
    }
    NSLog(@"key=%@,version=%@,infoDictionary=%@,saveVersion=%@,standardUserDefaults=%@",key,version,[NSBundle mainBundle].infoDictionary,saveVersion,[NSUserDefaults standardUserDefaults]);
    [self.window makeKeyAndVisible];
    return YES;
}

key=CFBundleVersion,version=1.0,infoDictionary={

    CFBundleDevelopmentRegion = en;

    CFBundleDisplayName = “\U65b0\U6d6a\U5fae\U535a”;

    CFBundleExecutable = “\U65b0\U6d6a\U5fae\U535a”;

    CFBundleIdentifier = “cn.itcast.—-“;

    CFBundleInfoDictionaryVersion = “6.0”;

    CFBundleInfoPlistURL = “Info.plist – file:///Users/dongjw/Library/Application%20Support/iPhone%20Simulator/7.1/Applications/F5E547C6-B809-4052-8C6F-CD9439D95998/%E6%96%B0%E6%B5%AA%E5%BE%AE%E5%8D%9A.app/”;

    CFBundleName = “\U65b0\U6d6a\U5fae\U535a”;

    CFBundleNumericVersion = 16809984;

    CFBundlePackageType = APPL;

    CFBundleShortVersionString = “1.0”;

    CFBundleSignature = “????”;

    CFBundleSupportedPlatforms =     (

        iPhoneSimulator

    );

    CFBundleVersion = “1.0”;

    DTPlatformName = iphonesimulator;

    DTSDKName = “iphonesimulator7.1”;

    LSRequiresIPhoneOS = 1;

    UIDeviceFamily =     (

        1

    );

    UIPrerenderedIcon = 1;

    UIRequiredDeviceCapabilities =     (

        armv7

    );

    UIStatusBarHidden = 1;

    UISupportedInterfaceOrientations =     (

        UIInterfaceOrientationPortrait

    );

},saveVersion=1.0,standardUserDefaults=<NSUserDefaults: 0x8f768a0>